Pressure & Barometers
The invisible weight of air — from Torricelli's tube to weather forecasting. Visualize atmospheric layers, explore 30 instruments and experiments, and convert pressure units.
Atmospheric Layers
Earth's atmosphere is a column ~100 km tall but with 99% of its mass below 30 km. Slide through the column to see pressure halve roughly every 5.6 km, temperature reverse direction at each layer boundary, and density fall exponentially.
The Collection
30 artifacts spanning four centuries of pressure science — from Torricelli's mercury tube to MEMS sensors in your phone. Click any card to copy its description.
No artifacts in this category.
From Aristotle to MEMS
Milestones from 350 BC (Aristotle: "nature abhors a vacuum") to 2020 (MEMS pressure sensors at sub-cent prices).
Hands-on Instruments
Convert between eight common pressure units, watch pressure drop exponentially with altitude, and forecast tomorrow's weather from a barometric trend.